Hydroxsys’ technology brings clean water to dairy processing

New Zealand based clean technology company Hydroxsys has partnered with an Auckland dairy processor to offer a new wastewater treatment that delivers clean water from the processing of milk and milk products.

Dairy processor NIG Nutritionals has been trialling Hydroxsys’ equipment at its facility at Paerata, south of Auckland since the start of 2021.  By introducing the Hydroxsys system, the company has substantially improved the quality and cleanliness of its wastewater discharge.

Hydroxsys’ systems use its proprietary family of polyethylene membrane-based filters and at NIG Nutritionals solid waste like milk fat, protein and oils are removed from the liquid phase, providing a far cleaner waste product. The technology also greatly reduces biological oxygen demand (BOD) and chemical oxygen demand (COD) in the processed wastewater, key parameters if the water is to be released back into the environment.

Chris Macbeth, CEO of NIG Nutritionals, said: “With the installation of the Hydroxsys process as part of our existing systems, we can effectively reduce our ‘waste’ and return up to 90% of the wastewater volume back to our system as a source of clean water.”